Dan Brown.
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With the upcoming Inferno nearly exhausting Hollywood’s precious reserves of Robert Langdon novels, Dan Brown has stepped in to replenish this rare natural resource. Publisher’s Weekly reports that Brown is working on a fifth book about the adventures of the Harvard symbologist, called Origin, to be released next year. According to Doubleday, the book will follow Langdon as he explores “the dangerous intersection of humankind’s two most enduring questions, and the earth-shaking discovery that will answer them.†Humankind’s third-most-enduring question, of course, was already answered by Ashton Kutcher.